CVE-2026-90994 Sssd: sssd: denial of service via malformed pam v1 requests

A flaw was found in sssd, specifically within the PAM Pluggable Authentication Modules responder's protocol v1 parser, pamparseindata. A local client with access to the PAM responder's UNIX socket can exploit this by negotiating protocol v1 and sending an empty or truncated PAM request body. This...

CVE-2026-90994

A vulnerability in sssd (System Security Services Daemon) allows a local denial of service via the PAM responder's protocol v1 parser , specifically the function pam_parse_in_data() . An attacker with access to the PAM responder's UNIX socket can negotiate protocol v1 and send an empty or truncat...

CVE-2026-90995

A flaw was found in SSSD System Security Services Daemon. A local attacker with privileges to connect to the PAM Pluggable Authentication Modules responder socket can send a specially crafted protocol request. If the pamappservices configuration is enabled and the service item is omitted from the...

CVE-2026-90994

A flaw was found in sssd, specifically within the PAM Pluggable Authentication Modules responder's protocol v1 parser, pamparseindata. A local client with access to the PAM responder's UNIX socket can exploit this by negotiating protocol v1 and sending an empty or truncated PAM request body. This...

PT-2026-91261

A flaw was found in sssd, specifically within the PAM Pluggable Authentication Modules responder's protocol v1 parser, pam parse in data. A local client with access to the PAM responder's UNIX socket can exploit this by negotiating protocol v1 and sending an empty or truncated PAM request body...

PT-2026-91262

Name of the Vulnerable Software and Affected Versions SSSD System Security Services Daemon affected versions not specified Description A local attacker with privileges to connect to the PAM Pluggable Authentication Modules responder socket can send a specially crafted protocol request. When the p...

Linux Distros Unpatched Vulnerability : CVE-2026-90995

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A flaw was found in SSSD System Security Services Daemon. A local attacker with privileges to connect to the PAM Pluggable Authentication Modules responder sock...

CVE-2026-90994: Out-of-bounds Read

A flaw was found in sssd, specifically within the PAM Pluggable Authentication Modules responder's protocol v1 parser, pamparseindata. A local client with access to the PAM responder's UNIX socket can exploit this by negotiating protocol v1 and sending an empty or truncated PAM request body. This...

CVE-2026-90995: NULL Pointer Dereference

A flaw was found in SSSD System Security Services Daemon. A local attacker with privileges to connect to the PAM Pluggable Authentication Modules responder socket can send a specially crafted protocol request. If the pamappservices configuration is enabled and the service item is omitted from the...

Linux Distros Unpatched Vulnerability : CVE-2026-90994

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A flaw was found in sssd, specifically within the PAM Pluggable Authentication Modules responder's protocol v1 parser, pamparseindata. A local client with acces...

JupyterHub has Unauthenticated Denial of Service via Unbounded Username Logging on Failed Login

ImpactInvalid input to login resulted in unbounded logging output. Only form-based Authenticators the default PAM Authenticator, but not the more widely used OAuthenticator are affected. PatchesUpgrade to 5.5.0. WorkaroundsUse an Authenticator that doesn't use a login form, such as OAuthenticator...

Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS / Pro Realtime 22.04 LTS / Pro Realtime 24.04 LTS : SSSD vulnerability (USN-8718-1)

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS / Pro Realtime 22.04 LTS / Pro Realtime 24.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-8718-1 advisory. It was discovered that SSSD did not properly validat...

pam security update

An update is available for pam. This update affects Rocky Linux 9. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list Pluggable Authentication Modules PAM provide a system to set up authentication...

RLSA-2026:64815 Moderate: pam security update

Pluggable Authentication Modules PAM provide a system to set up authentication policies without the need to recompile programs to handle authentication. Security Fixes: linux-pam: Plaintext password recovery via timing discrepancy in pamuserdb module CVE-2026-54411 For more details about the...

openSUSE 16: libipa_hbac-devel / libipa_hbac0 / libnfsidmap-sss / etc (openSUSE-SU-2026:21748-1)

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21748-1 advisory. Security issues fixed: - CVE-2026-68742: insufficient validation in the NSS responder can lead to an out-of-bounds read and a process crash when...

RockyLinux 9 : pam (RLSA-2026:64815)

The remote RockyLinux 9 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:64815 advisory. linux-pam: Plaintext password recovery via timing discrepancy in pamuserdb module CVE-2026-54411 Tenable has extracted the preceding description block directly...

AlmaLinux 9 : pam (ALSA-2026:64815)

The remote AlmaLinux 9 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2026:64815 advisory. linux-pam: Plaintext password recovery via timing discrepancy in pamuserdb module CVE-2026-54411 Tenable has extracted the preceding description block directly fr...

Moderate: Red Hat Security Advisory: pam security update

An update for pam is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CV...

linux-pam: Plaintext password recovery via timing discrepancy in pam_userdb module

A flaw was found in Linux-PAM's pamuserdb module. This vulnerability, categorized as an Observable Timing Discrepancy CWE-208, allows a local or network-adjacent attacker to recover plaintext passwords. By repeatedly attempting authentication and measuring response-timing differences during...

RHEL 9 : pam (RHSA-2026:64815)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:64815 advisory. Pluggable Authentication Modules PAM provide a system to set up authentication policies without the need to recompile programs to handle...